20213106 has 8 divisors (see below), whose sum is σ = 40426224. Its totient is φ = 6737700.

The previous prime is 20213099. The next prime is 20213107. The reversal of 20213106 is 60131202.

It is a sphenic number, since it is the product of 3 distinct primes.

20213106 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20213107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1684420 + ... + 1684431.

It is an arithmetic number, because the mean of its divisors is an integer number (5053278).

Almost surely, 2^20213106 is an apocalyptic number.

20213106 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20213106 is a wasteful number, since it uses less digits than its factorization.

20213106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3368856.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 20213106 is about 4495.8987977934. The cubic root of 20213106 is about 272.4024553374.

Adding to 20213106 its reverse (60131202), we get a palindrome (80344308).

The spelling of 20213106 in words is "twenty million, two hundred thirteen thousand, one hundred six".